Somthing about my script i making unity hang if i set the room count any higher that 0 can't figure out what though ?

Hi something about the script i have written to randomly generate a dungeon is making unit hang, and i can't think what is and cause of the hang can't debug it very well.

Here is the code: using UnityEngine; using System.Collections; using System.Collections.Generic;

 public class Genarator : MonoBehaviour {
     
 
     public List<GameObject> right = new List<GameObject>();
     public List<GameObject> left = new List<GameObject>();
     public List<GameObject> up = new List<GameObject>();
     public List<GameObject> down = new List<GameObject>();
 
     public int roomSize = 10;
     public int roomCount = 50;
 
     private int roomsMade = 0;
 
     private int[][] map;
 
     // Use this for initialization
     void Start () {
         startGeneration();
     
     }
     
     // Update is called once per frame
     void Update () {
     
     }
 
     private void startGeneration()
     {
         GameObject first = right[0];
         Instantiate(first, Vector3.zero,Quaternion.identity);
         GetRoomsToGen(first);
 
     }
 
     private void GetRoomsToGen(GameObject room)
     {
 
         DirectionsAvailable temp = room.GetComponent<DirectionsAvailable>();
 
         if(temp.Right && roomsMade < roomCount)
         {
             GenarateRoomRight(room);
 
             roomsMade++;
         }
         if(temp.Left && roomsMade < roomCount)
         {
             GenarateRoomLeft(room);
             roomsMade++;
         }
         if(temp.Up && roomsMade < roomCount)
         {
             GenarateRoomUp(room);
             roomsMade++;
         }
         if(temp.Down && roomsMade < roomCount)
         {
             GenarateRoomDown(room);
             roomsMade++;
         }
     }
 
     private void GenarateRoomRight(GameObject previousRoom)
     {
         int rand = Random.Range(0,right.Count-1);
         GameObject tempRoom = right[rand];
         Instantiate(tempRoom, previousRoom.transform.position,Quaternion.identity);
         GetRoomsToGen(tempRoom);
     }
     private void GenarateRoomLeft(GameObject previousRoom)
     {
         int rand = Random.Range(0,left.Count-1);
         GameObject tempRoom = left[rand];
         Instantiate(tempRoom, previousRoom.transform.position,Quaternion.identity);
         GetRoomsToGen(tempRoom);
     }
     private void GenarateRoomUp(GameObject previousRoom)
     {
         int rand = Random.Range(0,up.Count-1);
         GameObject tempRoom = up[rand];
         Instantiate(tempRoom, previousRoom.transform.position,Quaternion.identity);
         GetRoomsToGen(tempRoom);
     }
     private void GenarateRoomDown(GameObject previousRoom)
     {
         int rand = Random.Range(0,down.Count-1);
         GameObject tempRoom = down[rand];
         Instantiate(tempRoom, previousRoom.transform.position,Quaternion.identity);
         GetRoomsToGen(tempRoom);
     }
 }

Any help would be greatly appreciated :) Thanks

Update: I have narrowed it down to the GenerateRoom methods and i was wondering it it was been caused by them all trying to get the rooms at once?

Thanks again